diff --git a/backend/src/lib/config/env.ts b/backend/src/lib/config/env.ts
index b2eb16f56..25d6bccb4 100644
--- a/backend/src/lib/config/env.ts
+++ b/backend/src/lib/config/env.ts
@@ -233,7 +233,7 @@ const envSchema = z
     DATADOG_HOSTNAME: zpStr(z.string().optional()),
 
     // PIT
-    PIT_CHECKPOINT_WINDOW: zpStr(z.string().optional().default("5")),
+    PIT_CHECKPOINT_WINDOW: zpStr(z.string().optional().default("1")),
     PIT_TREE_CHECKPOINT_WINDOW: zpStr(z.string().optional().default("30")),
 
     /* CORS ----------------------------------------------------------------------------- */